/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.evaluation.value;

import proguard.classfile.*;

/**
 * This class represents a partially evaluated reference value.
 *
 * @author Eric Lafortune
 */
public class UnknownReferenceValue extends ReferenceValue {
    // Implementations of unary methods of ReferenceValue.

    public String getType() {
        return ClassConstants.NAME_JAVA_LANG_OBJECT;
    }

    public Clazz getReferencedClass() {
        return null;
    }

    public boolean mayBeExtension() {
        return true;
    }

    public int isNull() {
        return MAYBE;
    }

    public int instanceOf(String otherType, Clazz otherReferencedClass) {
        return MAYBE;
    }

    public ReferenceValue cast(String type, Clazz referencedClass, ValueFactory valueFactory, boolean alwaysCast) {
        return valueFactory.createReferenceValue(type, referencedClass, true, true);
    }

    // Implementations of binary methods of ReferenceValue.

    public ReferenceValue generalize(ReferenceValue other) {
        return other.generalize(this);
    }

    public int equal(ReferenceValue other) {
        return other.equal(this);
    }

    // // Implementations of binary ReferenceValue methods with
    // // UnknownReferenceValue arguments.
    //
    // public ReferenceValue generalize(UnknownReferenceValue other)
    // {
    // return other;
    // }
    //
    //
    // public int equal(UnknownReferenceValue other)
    // {
    // return MAYBE;
    // }
    //
    //
    // // Implementations of binary ReferenceValue methods with
    // // TypedReferenceValue arguments.
    //
    // public ReferenceValue generalize(TypedReferenceValue other)
    // {
    // }
    //
    //
    // public int equal(TypedReferenceValue other)
    // {
    // }
    //
    //
    // // Implementations of binary ReferenceValue methods with
    // // IdentifiedReferenceValue arguments.
    //
    // public ReferenceValue generalize(IdentifiedReferenceValue other)
    // {
    // return generalize((TypedReferenceValue)other);
    // }
    //
    //
    // public int equal(IdentifiedReferenceValue other)
    // {
    // return equal((TypedReferenceValue)other);
    // }
    //
    //
    // // Implementations of binary ReferenceValue methods with
    // // ArrayReferenceValue arguments.
    //
    // public ReferenceValue generalize(ArrayReferenceValue other)
    // {
    // return generalize((TypedReferenceValue)other);
    // }
    //
    //
    // public int equal(ArrayReferenceValue other)
    // {
    // return equal((TypedReferenceValue)other);
    // }
    //
    //
    // // Implementations of binary ReferenceValue methods with
    // // IdentifiedArrayReferenceValue arguments.
    //
    // public ReferenceValue generalize(IdentifiedArrayReferenceValue other)
    // {
    // return generalize((ArrayReferenceValue)other);
    // }
    //
    //
    // public int equal(IdentifiedArrayReferenceValue other)
    // {
    // return equal((ArrayReferenceValue)other);
    // }
    //
    //
    // // Implementations of binary ReferenceValue methods with
    // // DetailedArrayReferenceValue arguments.
    //
    // public ReferenceValue generalize(DetailedArrayReferenceValue other)
    // {
    // return generalize((IdentifiedArrayReferenceValue)other);
    // }
    //
    //
    // public int equal(DetailedArrayReferenceValue other)
    // {
    // return equal((IdentifiedArrayReferenceValue)other);
    // }
    //
    //
    // // Implementations of binary ReferenceValue methods with
    // // TracedReferenceValue arguments.
    //
    // public ReferenceValue generalize(TracedReferenceValue other)
    // {
    // return other.generalize(this);
    // }
    //
    //
    // public int equal(TracedReferenceValue other)
    // {
    // return other.equal(this);
    // }

    // Implementations for Value.

    public boolean isParticular() {
        return false;
    }

    public final String internalType() {
        return ClassConstants.TYPE_JAVA_LANG_OBJECT;
    }

    // Implementations for Object.

    public String toString() {
        return "a";
    }
}